I am located near Kay in Pa. and I am concerned about the same thing as other northern pond owners, We have had so much snow and ice, you can't get near the pond to clean any of it off. We are now getting some thaw so this should help. Last year, we had much more snow and ice and I couldn't see any problems with my pond in the spring. But, this leads me to ask......how can you tell that you have had a winter kill of fish in your pond? Will there be floating bodies, carcusses on the bottom? I just need to know what to look for. Thanks for the advice.